538945569 has 24 divisors (see below), whose sum is σ = 824503680. Its totient is φ = 351644976.

The previous prime is 538945549. The next prime is 538945579. The reversal of 538945569 is 965549835.

It is a happy number.

538945569 is a `hidden beast` number, since 5 + 3 + 89 + 4 + 556 + 9 = 666.

It is not a de Polignac number, because 538945569 - 2⁸ = 538945313 is a prime.

It is a super-2 number, since 2×538945569² = 580924652689467522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538945549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12174 + ... + 35015.

It is an arithmetic number, because the mean of its divisors is an integer number (34354320).

Almost surely, 2^538945569 is an apocalyptic number.

It is an amenable number.

538945569 is a deficient number, since it is larger than the sum of its proper divisors (285558111).

538945569 is an equidigital number, since it uses as much as digits as its factorization.

538945569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47251 (or 47239 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The square root of 538945569 is about 23215.2012483200. The cubic root of 538945569 is about 813.7949088596.

The spelling of 538945569 in words is "five hundred thirty-eight million, nine hundred forty-five thousand, five hundred sixty-nine".